Dr. Marawan Shahin, Professor of Hadith and its Sciences, Faculty of Usul Ad-Din (Theology),Al-Azhar Univ. states: “According to what can be apparently deduced from the evidences of Shari`ah, Hellfire will continue forever. Almighty Allah says, “Lo! Allah hath cursed the disbelievers, and hath prepared for them a flaming fire, wherein they will abide for ever. They will find (then) no protecting friend nor helper.” (Al-Ahzab 33: 64-65)
So, according to the texts of the Qur’an, the disbelievers will reside in Hellfire forever. As for sinful Muslims whom Almighty Allah wills to punish them for their faults and sins, they will reside for some time in Hell, and they will leave it and enter Paradise.
With the above in mind, it becomes clear that everyone who dies as a believer will finally enter Paradise. And everyone who dies as a disbeliever will enter and reside in Hell forever.”